Lung nodules are one of the most common pathological changes, thus early detection of lung nodule is very important for the diagnosis medical treatment of lung eancer. In recent years, as the application of multi-slice spiral CT(MSCT), high-resolution CT(HRCT) and low-dose chest CTCLDCT), computer-aided diagnosis (CAD) system will be more essential and more important. Since CAD system can improve the working efficiency of doctors and provide service to more patients, has become the research hotspot and achievement has been made in relevant area internationally recently. This review summarizes the basic methods and applieations of computer-aided detection and diagnosis of lung nodule based on CT image.

ObjectiveTo explore the expression of EZH2 and p53 protein in primary prostate cancer (Pca) and its clinical significance.Methods High-throughput tissue microarray technique and immunohistochemistry was used to detect the expression of EZH2 and p53 protein in 48 human prostate cancer specimens without a history of chemo-radiation therapy and 15 cases of benign prostate hyperplasic (BPH) tissues. The pathological characteristics and the relationship of the expression of EZH2 and p53 protein in primary prostate cancer was analyzed. ResultsImmunohistochemical results showed that the positive rates of EZH2 and p53 protein in prostate cancer were 87.50 ％ (42/48) and 33.33 ％ (16/48), respectively, which were significantly higher than that in BPH tissues[13.33 ％ (2/15) and 0 (0/15)](x2=26.429, x2=5.058,P ＜0.05). The expression of EZH2 and p53 protein was significantly related to Gleason score, TNM stage (P ＜0.05), but not to age and serum prostate-specific antigen (PSA) level (P ＞0.05). The positive expression in patients with Gleason＞6 was higher than that with Gleason≤6(P ＜0.05).The positive expression in patients with T3-T4 stage was higher than that with T1-T2 stage(P ＜0.05).Spearman rank correlation showed a significantly positive correlation between EZH2 and p53 protein (r=0.294, P ＜0.05). ConclusionEZH2 and p53 protein may participate in the pathogenesis of prostate cancer.The overexpression of EZH2 and p53 protein could become an index for the evaluation of the level of malignancy and progression of prostate cancer.Furthermore,combining detection of EZH2 and p53 protein may provide a new theoretical basis for the treatment of prostate cancer.

Dendritic Cells, Follicular ; pathology ; Diagnosis, Differential ; Humans ; Leukemia, Lymphocytic, Chronic, B-Cell ; pathology ; Lymphoma ; pathology ; Lymphoma, Extranodal NK-T-Cell ; pathology ; Lymphoma, Follicular ; pathology ; Lymphoma, Large B-Cell, Diffuse ; pathology ; Lymphoma, Large-Cell, Anaplastic ; pathology ; Lymphoma, Mantle-Cell ; pathology ; Lymphoma, T-Cell, Peripheral ; pathology ; Neoplasm Invasiveness ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; pathology

Objective To study the role of bacterial collagenase in wound healing with observing capillary neovascularization, epidermis regeneration and collagen fiber reparation in vivo. Method A total of 28 New Zealand rabbits were made into models of superficial soft tissue trauma and divided into two groups. In the experimental group, the right limbs of rabbits were traumatized intentionally in the same length and depth, and their wounds were treated with bacterial collagenase liquor 133 MIU/mL, and the wounds were sutured. Similarly, in the control group, the left limbs of the rabbits were modeled in the same way and their wounds were managed with physiological saline instead and closed. Their wounds were observed continually 1, 2, 3, 5, 7, 10 and 14 days after traumatized. Data were analyzed statistically by using One-way ANOVA, LSD-test, and Wilcoxon rank test. Results There were no significant differences in capillary neovascularization and epidermis regeneration between two groups ( F = 0.12, P = 0.740 and F = 0.95, P = 0.33, respectively), but significant difference in collagen fiber reparation was found between two groups (F = 6.63, P = 0.01). Conclusions In the progress of wound healing, bacterial collagenase can improve the collagen fiber reparation without effects on the new capillary vasculogenesis and epidermis regeneration. The bacterial collagenase does not play a positive role in wound healing.

Diffuse large B-cell lymphoma is the most common histology of non-Hodgkin lymphoma and is composed of clinically and pathologically heterogeneous group.The ESMO clinical practice guidelines stratified the diseases according to age,age-adjusted IPI and feasibility of dose-intensified approaches.While the regimens suggested by ESMO are almost the same:six to eight cycles of chemotherapy with CHOP combined with rituximah.This article discussed the inadequacies of the guideline according to the recent clinical and pre-clinical studies and the authors' personal experiences.Four deficiencies are outlined:new prognostic factors are not included for the stratification,no therapy adjustmett was advised according to the response,overload therapy for the very-low risk patient,and insufficient therapy for the young,high-risk patients.

Marginal zone lymphomas include three subgroups of lymphoma,with differences on etiology,pathogenesis,molecular cytogenetics,prognosis,as well as involved sites.Based on the reports from the latest ASH annual meeting,the present article introduces the uptodate understanding on the three subtypes of MZL.The recent advances on etioloty,pathogenesis,diagnosis and differential diagnosis were reviewed.

OBJECTIVE:To estimate the uncertainty in the content determination of azithromycin granules by microbiological method.METHODS:The origin and degree of uncertainty in the content determination of azithromycin granules by microbiological method were analyzed and evaluated in accordance with the standard given in JJF1059-1999 "Evaluation and Expression of Uncertainty in Measurement".RESULTS:The expanded uncertainty was 5 420.0 IU/bag,and the results of the determination can be expressed as(103 838.0?5 420.0)IU/bag.The uncertainty was chiefly originated from method design,followed by solution dilution.CONCLUSIONS:The degree of uncertainty for the content determination of antibiotic drugs by microbiological method can be effectively reduced by suitable method design and reducing the times of dilution.

Stat3 is a member of the STAT (signal transducer and activator of transcription) protein family. It can be activated by many cytokines, growth factors and carcinogens. Activation of Stat3 in the cytoplasm leads to its dimerization, translocation into the nucleus, DNA binding and gene transcription. Constitutively activated Stat3 is associated with cellular transformation, invasion, metastasis, angiogenesis, chemoresistance and radioresistance, and therefore suppress apoptosis of cancer.

BACKGROUND: Intestinal mucosa was damaged by ischemia and hypoxia during severe burn, and injury and infection of oxygen-derived free radicals during reperfusion.OBJECTIVE: To study on the basis of sub-cell level whether danshen can improve respiratory function of mitochondrion of epithelial cell in intestinal mucosa and decrease the production of oxygen-derived free radicals so as to protect intestinal mucosa of burnt rats.DESIGN: Randomized controlled animal study with single sample.SETTING: Department of Burn, the Third Hospital of Chinese PLA.MATERIALS: The experiment was conducted at the Surgery Institute of the Third Hospital of Chinese PLA from December 2001 to February 2002.Totally 96 SD rats of clean grade were randomly divided into normal control group (n=24), burning model group (n=36) and danshen treatment group (n=36). 1 mL danshen parenteral solution had 1.5 g raw materials.METHODS: ① Rats in the burning model group and danshen treatment group were used to establish grade Ⅲ burning models with 20% scald of total body surface. ② Rats in the normal control group were not injured.③ After modeling, 1 mL/kg danshen parenteral solution was slowing injected into rats in the danshen treatment group through femoral vein, but saline was injected slowly into rats in the normal control group and burning model group. ④ Twelve rats from each of the burning mgdel group and the danshen treatment group were sacrificed at 1, 2 and 6 hours after modeling, and 8 rats in the normal control group were sacrificed at relevant time points respectively. ⑤ Samples of small intestine were collected to measure cytochrome aa3, cytochrome C, level of energy charge and activity of superoxide dismutase of mitochondrion of epithelial cells in intestinal mucosa.MAIN OUTCOME MEASURES: Cytochrome aa3, cytochrome C, level of energy charge and activity of superoxide dismutase of mitochondrion of epithelial cells in intestinal mucosa 1, 2 and 6 hours after modeling.RESULTS: Totally 96 SD rats entered the final analysis. ① Level of cytochrome aa3 of mitochondrion of epithelial cells in intestinal mucosa at various time points after modeling: Levels of cytochrome aa3 did not changed obviously in the burning model group and danshen treatment group 2 hours after modeling as compared with that in the normal control group (P＞ 0.05). Six hours after burning, levels in the burning model group were obviously lower than those in the normal control group (P ＜ 0.05), but those in the danshen treatment group were obviously higher than those in the burning model group [(3.16±0.13), (2.5640.15) μkat/g, P ＜ 0.05]. ②Measurements of cytochrome C, level of energy charge and activity of superoxide dismutase of mitochondrion of epithelial cells in intestinal mucosa at various time points after modeling: As compared with those in the normal control group, measurements were decreased obviously in the burning model group 1, 2 and 6 hours after modeling (P ＜ 0.05 or 0.01), but those in the danshen treatment group were obviously higher than those in the burning model group (P ＜ 0.05 or 0.01).CONCLUSION: Danshen can raise the levels of cytochrome aa3, cytochrome C, energy production and SOD, and also reduce the production of oxygen-derived free radicals so as to improve respiratory function of mitochondria of epithelial cells in intestinal mucosa of rats.

Objective To understand the clinical significance of serum immunoglobulins and C3 at the initial episode on the treat-ment and prognosis of childhood primary nephrotic syndrome(PNS) .Methods 426 children patients with first episode of PNS ad-mitted to the nephrology department of our hospital from January 1 ,2003 to December 30 ,2012 were retrospectively analyzed .The clinical data were collected for conducting the analysis on the immuneglobulins and C 3 levels in different age groups ,clinical classifi-cation ,hormone response ,recurrence ,prognosis and correlation among various pathological types .Results (1)Compared with the healthy children ,the peripheral blood IgG level in childhood PNS was significantly decreased ,while the IgM and IgE level were sig-nificantly increased .(2)The IgE level in steroid-sensitive nephrotic syndrome(SSNS) was higher than that in steroid-resistant ne-phrotic syndrome(SRNS);which in frequent recurrence nephrotic syndrome was higher than that in non-recurrence nephrotic syn-drome .(3) The C3 level in the PNS children patients aged over 1 years and nephritis nephrotic syndrome(NNS) was lower than that in simple nephrotic syndrome(SNS) .Conclusion PNS is correlated with the immune dysfunction .Serum IgE level increase clinically manifests by the steroid sensitivity and frequent relapse ;the lower the C3 level ,the poorer the prognosis .